671 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-671 is a high-performance dielectric thin-film filter specifically designed for 671 nm laser Raman spectroscopy systems. Manufactured on a high-quality fused silica substrate with precision hard‑coated dielectric layers, it provides efficient rejection of the 671 nm laser line while maintaining high transmittance for Raman scattering signals. Featuring an ultra-steep cut-off edge, an extremely high optical density (OD > 6), high pass-band transmittance, and excellent environmental stability, this filter effectively improves the signal-to-noise ratio of Raman spectroscopy systems. It is particularly suitable for low-wavenumber Raman measurements, micro-Raman spectroscopy, laser spectral analysis, and research optical instruments.

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664 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-664 is a high-performance dielectric thin-film filter specifically designed for 664 nm laser Raman spectroscopy systems. Manufactured on a high-quality fused silica substrate with precision hard‑coated dielectric layers, it provides efficient rejection of the 664 nm laser line while maintaining high transmittance for Raman scattering signals. Featuring an ultra-steep cut-off edge, an extremely high optical density (OD > 6), high pass-band transmittance, and excellent environmental stability, this filter effectively improves the signal-to-noise ratio of Raman spectroscopy systems. It is particularly suitable for low-wavenumber Raman measurements, micro-Raman spectroscopy, laser spectral analysis, and research optical instruments.

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647.1 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-647 is an ultra-steep-edge long-pass filter specifically designed for 647.1 nm laser systems. Employing high-performance multi-layer dielectric coating technology, it provides efficient rejection of the 647.1 nm laser line and short-wavelength background light, while ensuring excellent transmission for Raman scattered light, fluorescence signals, and other long-wavelength radiation above the cut-off edge. The filter offers a blocking depth of OD > 6 at the 647.1 nm laser wavelength and an average transmittance greater than 93% over the 655.5-1459.6 nm band. With an ultra‑narrow transition band of only 6.5 nm and an ultra-steep cut-off edge, it effectively improves the detection efficiency of near-laser-line Raman signals, making it widely applicable in Raman spectrometers, laser analysis, and precision optical systems.

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632.8 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-633 is an ultra-steep-edge long-pass filter specifically designed for 632.8 nm laser systems. It provides deep blocking of the 632.8 nm laser line and short-wavelength background light, while allowing efficient transmission of Raman and fluorescence signals above the cut-off edge. The product offers an optical density greater than OD6 at 632.8 nm and an average transmittance greater than 93% over the 641-1427.4 nm band. With a transition width of only 6.3 nm, it is ideally suited for Raman spectroscopy systems that demand high laser rejection, steep cut-off edges, and efficient near-laser-line signal collection.

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561.4 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-561 is an ultra-steep longpass edge filter specifically designed for 561.4 nm laser Raman spectroscopy systems. Manufactured with a high-quality fused silica substrate and precision dielectric thin‑film coating technology, it provides efficient blocking of the 561.4 nm excitation laser while maintaining high transmission in the Raman scattering signal band. Featuring laser suppression of OD > 6, an ultra-narrow transition band, and an ultra-steep cut-off edge, this filter effectively reduces Rayleigh scattering background and improves Raman signal detection sensitivity. It is suitable for high-end Raman spectrometers, laser analysis systems, and research-grade optical inspection equipment.

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532 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-532 is an ultra-steep longpass edge filter specifically designed for 532 nm laser Raman spectroscopy systems. Manufactured with a high-quality fused silica substrate and precision dielectric thin-film coating technology, it provides efficient blocking of the 532 nm excitation laser while maintaining high transmission in the Raman scattering signal band. Featuring laser suppression of OD > 6, an ultra-narrow transition region, and excellent cut‑off edge steepness, this filter significantly improves the signal-to-noise ratio in Raman systems. It is suitable for research-grade Raman spectrometers, laser analysis equipment, and high-precision optical inspection systems.

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514.5 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-514 is an ultra-steep longpass edge filter specifically designed for 514.5 nm laser Raman spectroscopy systems. Manufactured using high-performance dielectric thin-film coating technology, it effectively blocks the excitation laser while providing high transmission for Raman scattering signals. With an ultra-steep cut-off edge, high blocking depth, and excellent optical stability, it is widely used in Raman spectrometers, research analysis instruments, biomedical detection, and precision optical systems.

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488 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-488 is an ultra-steep longpass edge filter specifically designed for 488 nm laser Raman spectroscopy systems. Manufactured using high-performance dielectric coating technology, it offers excellent blocking capability at the 488 nm laser wavelength while providing high transmission in the Raman Stokes signal band. This effectively suppresses the excitation laser and enhances Raman signal collection efficiency. Featuring a high-quality fused silica substrate, the filter delivers outstanding optical stability, high laser damage resistance, and long-term environmental reliability. It is widely used in Raman spectrometers, confocal Raman microscopes, fluorescence analysis, biomedical detection, and research instrumentation.

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473 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-473 is a high-performance ultra-steep edge long-pass filter specifically designed for 473 nm laser Raman spectroscopy systems. Manufactured using high-precision ion-beam sputtering (IBS) multi-layer dielectric coating technology, it provides a blocking depth of >OD6 at the 473 nm laser line while maintaining an average transmittance >93% over the 479.1-1066.9 nm range. This effectively eliminates Rayleigh scattered light, significantly improving Raman signal collection efficiency and detection sensitivity. Featuring an ultra-steep cut-off edge, extremely low Raman cut-off shift, broad spectral transmission range, and excellent environmental stability, this filter is suitable for research-grade Raman spectrometers, confocal Raman microscopes, biomedical analysis, and industrial in-line Raman detection applications.

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457.9 nm Ultrasteep Raman Long-Pass Filter

Specifically designed for 457.9 nm Raman laser systems；Rayleigh scattering blocking depth > OD6；Ultra‑steep cut‑off edge；Raman shift cut‑off at only 108.7 cm⁻¹；Fused silica substrate – low fluorescence and low stress；High environmental stability for long‑term use

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441.6 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-442 is a high-performance ultra-steep edge long-pass filter specifically designed for 441.6 nm laser Raman spectroscopy systems. Manufactured using high-precision ion-beam sputtering (IBS) multi-layer dielectric coating technology, it provides a blocking depth of >OD6 at the 441.6 nm laser line while maintaining an average transmittance >93% over the 447.3-996.1 nm range. This effectively suppresses Rayleigh scattering and improves both Raman signal collection efficiency and signal-to-noise ratio. Featuring an extremely low Raman cut-off shift, ultra-steep edge, high transmittance, and excellent environmental stability, this filter is widely used in research-grade Raman spectrometers, confocal Raman microscopes, and industrial in-line Raman detection systems.

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407 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-407 is a high-performance ultra-steep edge long-pass filter specifically designed for Raman spectroscopy systems. Manufactured using high-precision ion-beam sputtering (IBS) multi-layer dielectric coatings, it provides a blocking depth of >OD6 at the 407 nm laser line while maintaining an average transmittance >93% over the 412.3–918 nm range. This effectively suppresses Rayleigh scattering and enhances Raman signal collection efficiency. The filter is ideal for 407 nm laser Raman spectrometers, confocal Raman microscopy systems, scientific research, and precision optical detection equipment.

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